Postmodern

Postmodern is a Common Lisp library for interacting with PostgreSQL databases.
Features are:

Efficient communication with the database server without
need for foreign libraries.

Support for UTF-8 on Unicode-aware Lisp implementations

A lispy syntax for expressing SQL queries

Convenient support for prepared statements and stored
procedures

Defclass-like definition of tables and associated accessor
classes

The biggest differences between this library and CLSQL/CommonSQL are that
postmodern has no intention of being portable across different SQL
implementations (it embraces non-standard Postgres features), and
approaches extensions like lispy SQL and database access objects
in a quite different way. This library was written because the
CLSQL approach did not really work for me, your mileage may
vary.